Art 1 Sec 8 specifically lists those uses to what the FedGov may put it’s “property”. DC, tem miles square, .mil bases, navy docks, office buildings, post roads, and post offices.
86% of a State? To be made off limits to any public use for no real reason whatsoever?
Anathema.
You also have to consider the provisions of the Treaty Clause, which was the part of the Constitution inovked. That’s how the West was won.